Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Poly(methacrylic acid)-grafted hollow silica vesicles (PMAA-g-hollow silica vesicles) were obtained through a grafting-from approach. PMAA brushes were formed by performing atom-transfer radical polymerisation of sodium methacrylate with an initiator attached to the hollow silica spheres. PMAA-g-hollow silica vesicles…
The electrical behavior of multi-walled carbon nanotube network embedded in amorphous silicon nitride is studied by measuring the voltage and temperature dependences of the current. The microstructure of the network is investigated by cross-sectional transmission electron microscopy. The multi-walled carbon nanotube n…
Specially designed transmission electron microscopy (TEM) sample carriers have been developed to enable atomically resolved studies of the heat-induced evolution of adsorbates on graphene and their influence on electrical conductivity. Here, we present a strategy for graphene-based carrier realization, evaluating its…
Abstract A detailed study of electronic properties of tungsten dioxide (WO 2 ) has been performed by means of the projector‐augmented wave method. Two phases were considered: stable monoclinic, which was characterized as a metallic one, and high‐temperature metastable orthorhombic, which was found to be a semiconducto…
We have successfully grown epitaxial, superconducting films of Ba(Fe1-xCox)2As2(Ba-122)withx~ 0.1. The films grow without observable correlated defects parallel to the c-axis, as confirmed by TEM. This is also reflected in the absence of a c-axis peak inJc(θ). In contrast to cuprate high-Tcsuperconductors such as YBa2…
We report on extreme low-temperature growth of ZnO by plasma-assisted molecular beam epitaxy. Epilayers and quantum well (QW) structures with very good structural and optical properties are prepared at substrate temperatures as low as 50 °C. The growth proceeds in a single crystalline layer-by-layer mode. ZnO QWs prep…
A CMB monomer was polymerized on a glass plate with a surface-confined ATRP initiator containing a 2-bromoisobutyryl group. The glass plate modified with a PCMB brush was highly hydrophilic and showed a strong resistance against non-specific adsorption of proteins and cell adhesion. Upon ion beam irradiation, furtherm…
The aim of the present work was to ascertain the effect of ultrasonic waves on convective drying performance. In the tested range of process and operating conditions, it was proved that compared to a traditional convective process, ultrasounds enhanced the drying rate of cylindrical carrot samples. The obtained result…
We have investigated the role of the Ti-O Coulomb repulsions in the appearance of the ferroelectric state in BaTiO3 as well as the role of the Zn-O Coulomb repulsions in BiZn0.5Ti0.5O3, using a first-principles calculation with optimized structures. In tetragonal BaTiO3, it is found that the Coulomb repulsions between…
Physically crosslinked PVA-hydrogel microparticles are utilized for encapsulation of E. coli and M. luteus. The bacteria survive dry storage or treatment with bacteria-hostile organic solvents significantly better than unprotected bacteria as proven by culture-test experiments. The bacteria-protecting PVA microparticl…
Cr-doped Ni–Zn ferrite nanoparticles having the general formula Ni 0.5 Zn 0.5 Cr x Fe 2− x O 4 ( x =0.1, 0.3, 0.5) were prepared by the simplified sol–gel method. The structural and dielectric properties of the samples sintered at 750±5 °C were studied. X-ray diffraction (XRD) patterns confirm the single-phase spinel…
The structural performance of double-walled C(5, 5)@BN(10, 10) and C(5, 5)@C(10, 10) nanotubes subject to high temperatures is investigated through molecular dynamics simulations. It is found that the inner tube C(5, 5) in the C(5, 5)@BN(10, 10) exhibits less distortion than that in the C(5, 5)@C(10, 10) at annealing…
The structural, microstructural and morphological, as well as electric and dielectric, properties of nickel–zinc ferrite (Ni 0.3 Zn 0.7 Fe 2 O 4 ) derived from sol–gel auto-combustion have been studied after sintering from 900 to 1300 °C. The effect of heating rate has not been previously investigated and is reported…
Magnetoelectric composites have been synthesized by sintering mixtures of highly piezoelectric component Pb ( Zr 0.52 Ti 0.48 ) O 3 , PZT and highly magnetostrictive piezomagnetic component Ni 0.93 Co 0.02 Mn 0.05 Fe 1.95 O 4-δ , NCMF. These composites with generic formula (1 - x) PZT + x Ni 0.93 Co 0.02 Mn 0.05 Fe 1.…
Abstract Behavior of a screw dislocation inside a nanotube (NT) is considered in the context of surface elasticity. The elastic fields as well as the image force acting over the dislocation are derived and analyzed in detail. In contrast with the result of classical elasticity, the screw dislocation is shown to be rep…
A new dipyridylthiazolylethene (1a) and its dicationic analogue (2a), with two N-methylated pyridyl rings, have been synthesized and structurally characterized. Due to the N-methylation of the pyridyl rings, 2 a displays not only very different photochromic properties, but also undergoes a reductive ring-closing react…
Technique has been developed to fabricate ordered arrays of microcontainers. We report that ordered microcontainer arrays of Cu can be fabricated on glass substrate by thin film deposition and self-assembly technology. In addition, CuO nanowires are found to grow only in the inner sides of microcontainers, which verif…
Engineering the photo-emission characteristics of single-photon emitters is crucial for the growing field of quantum technologies. We show that the photoluminescence of a single nitrogen-vacancy color center in nanodiamond could be significantly enhanced when attached to a gold film of 50 nm with preserving photophysi…
Molecular dynamics simulations are used to investigate the dynamic behaviour of SiC nanowires under strain rates between 2 × 10 9 s −1 and 2 × 10 11 s −1 . Nanowires of different cross sections in the wurtzite (WZN) and zinc blende (ZBN) phases are considered under tensile and compressive deformation. Results show con…
It is well known that impulse voltages strongly affect the reliability of gas-insulated switchgear (GIS) under actual operational conditions. The alternating-current (ac) withstand voltage test and its corresponding partial discharge (PD) measurement are inadequate for the detection of all the hidden flaws in GIS. Suc…